Saudi-backed Yemeni government forces say they have taken key heights in the mountain belt of western Taiz, overlooking the Red Sea coast, as part of the "Dawn of Yemen" offensive announced to retake Houthi-held territory, including the capital Sanaa. The army claims to have "neutralised" 1,860 Houthi fighters, while the Saudi-led coalition says it hit 82 Houthi targets after attacks on Saudi airports in Riyadh and Abha killed three people. The fighting, centred near the Bab al-Mandeb Strait (a vital shipping chokepoint at the mouth of the Red Sea), matters more now that the US-Iran conflict has curbed trade through the Strait of Hormuz, and the UN says more than 200,000 people have been displaced.